9 cm Lab Filter Paper Standard Grades 1 2 4 - Fast Medium Slow Flow 90 mm Bun...

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9 cm Lab Filter Paper Standard Grades 1 2 4 - Fast Medium Slow Flow 90 mm Bun...
Item Details
GRADE 1, 2, 4 STANDARD Qualitative Filter Paper Equivalent to Whatman grade 1, 2, 4, these laboratory filter paper are used for a broad range of filtration when you need to separate a solid or precipitate from the filtrate. Made from high alpha-cellulose cotton, these standard lab filter are not intended for ashing. APPLICATIONS Depending on the grades, these filters have many applications, for example: science : From clean-up of insoluble liquids to routine clarification of suspension food : From solid foodstuffs separation and liquid extraction to fat content determination beverage : From filtration of musts, pulps and syrups to malt analysis agriculture : From soil pre-filtration to analysis environment : From monitoring of fast flowing exhausts to smoke pollution COARSE TO HIGH RETENTION Retains fine, medium and coarse precipitates depending on grade used, for example: Grade 1 : Metal Sulfates (Pb, coarse form of Ba and Ca) Grade 2 : Metal Sulfides (Cd, Ni, Zn, Fe, Pb, Mn, Ag, As) Grade 4 : Metal hydroxides (Al, Cr, Fe, Mg) , Be Oxide paper : pure cotton cellulose flow : slow, medium, fast retention : 5~10, 10~15, 20~25 μm (fine, medium, coarse) speed : 15~20 s (10ml DIN 53137) size : ⌀ 90 mm thickness : 140-160 μm weight : 86 g/m² ash : 0.1% qty : 300 discs PLAIN-DISCS These Flat Discs are suitable for gravity and Buchner low suction vacuum filtration. The same affordable filters are also available funnel-ready prefolded or prepleated. EQUIVALENCE & SIZE See the cross-reference table and size diagrams in the photos to choose the appropriate reference and diameter of your circles.
Product Features
GRADES 1, 2, 4 : 9cm - Equivalent to Whatman Top 3 standard qualitative grades (90mm)
GRADE 1 : MEDIUM RETENTION / MEDIUM FLOW - Retains medium crystalline particles (10~15 micron)
GRADE 2 : HIGH RETENTION / SLOW FLOW - Retains fine crystalline particles (5~10 micron)
GRADE 4 : COARSE RETENTION / FAST FLOW - Retains coarse and gelatinous precipitates (20~25 micron)
BROAD APPLICATION RANGE : lab & chemistry, food & agriculture, brewing & wine, air & gas filtration
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